This option is used for aggregating routes.
prefix/preflen
specifies the prefix and the prefix length of the aggregated route. When
advertising routes, route6d filters specific
routes covered by the aggregate and advertises the aggregated route
prefix/preflen
to the interfaces specified in the comma-separated interface list
if1[,if2,...].
route6d creates a static route to
prefix/preflen,
with the RTF_REJECT flag set, into the
kernel routing table.

Enables aging of the statically defined routes. With this
option, any statically defined routes will be removed unless corresponding
updates arrive as if the routes are received at the startup of
route6d.

Filter incoming routes from interfaces
if1[,if2,...].
route6d will accept incoming routes that are
in
prefix/preflen.
If multiple -L options are specified, all
routes that match any of the options are accepted.
::/0 is treated specially as the default route,
not “any route that has longer prefix length than, or equal to,
0”. For example, with “-L 3ffe::/16,if1 -L ::/0,if1”,
route6d will accept the default route and
routes in the 3ffe::/16 address range, but no others. To accept any route,
simply do not specify the -L option.

By default, route6d will not
exchange site local routes for safety reasons. This is because the
semantics of site local address space are rather vague, as the
specification is still being worked on, and there is no good way to define
the site local boundary. With -l,
route6d will exchange site local routes as
well. It must not be used on site boundary routers, since
-l assumes that all interfaces are in the
same site.